Teledyne 6200T - Sulfides Analyzer - Manual (Page 283)

6200T Total Sulfur Analyzer Troubleshooting
Teledyen Analytical Instruments 283
22. After the Converter comes to the regulated temperature, perform the Auto Tune
function (see Section 3.4.1.3) to tune the Temperature Controller to the new
thermocouple.
23. After the Auto-Tune process is completed, verify that the “process” temperature
is indicating that the desired temperature is stable and being regulated.
The converter is now ready for operation.
12.9. Frequently Asked Questions (FAQs)
The following list contains some of the most commonly asked questions relating to the
6200T SO
2
Analyzer.
QUESTION ANSWER
Why is the ZERO or SPAN button not
displayed during calibration? The 6200T disables these buttons when the expected span or zero value entered by
the users is too different from the gas concentration actually measured value at the
time. This is to prevent the accidental recalibration of the analyzer to an out-of-
range response curve.-EXAMPLE: The span set point is 400 ppb but gas
concentration being measured is only 50 ppb.-For more information, refer to Section
12.4.4 and Section 12.4.5.
Why does the ENTR button
sometimes disappear on the Front
Panel Display? During certain types of adjustments or configuration operations, the ENTR button
will disappear if you select a setting that is nonsensical (such as trying to set the 24-
hour clock to 25:00:00) or out of the allowable range for that parameter (such as
selecting a DAS hold off period of more than 20 minutes).-Once you adjust the
setting in question to an allowable value, the ENTR button will re-appear.
How do I enter or change the value of
my Span Gas? Press the CONC button found under the CAL or CALS menus of the main SAMPLE
menu to enter the expected SO
2
span concentration.-Refer to Section 3.4.4.1 or for
more information.
Why does the analyzer not respond to
span gas? Section 12.4.4 has some possible answers to this question.
Can I automate the calibration of my
analyzer? Any analyzer with zero/span valve or IZS option can be automatically calibrated
using the instrument’s AutoCal feature.-However, the accuracy of the IZS option’s
permeation tube is ±5%. While this may be acceptable for basic calibration checks,
the IZS option is not permitted as a calibration source in applications following US
EPA protocols. -To achieve highest accuracy, it is recommended to use cylinders of
calibrated span gases in combination with a zero air source. Teledyne Analytical
Instruments offers a zero air generator Model 701 and a gas dilution calibrator
Model T700 for this purpose.
What do I do if the concentration on
the instrument's front panel display
does not match the value recorded or
displayed on my data logger even if
both instruments are properly
calibrated? This most commonly occurs for one of the following reasons: -A difference in circuit
ground between the analyzer and the data logger or a wiring problem;-A scale
problem with the input to the data logger. -The analog outputs of the 6200T can be
manually adjusted to compensate for either or both of these effects, refer to 5.9.3.4;
-The analog outputs are not calibrated, which can happen after a firmware upgrade.
-Both the electronic scale and offset of the analog outputs can be adjusted (refer to
Section 5.9.3.2). Alternately, use the data logger itself as the metering device during
calibrations procedures.
How do I perform a leak check? Refer to Section 11.3.6.
How do I measure the sample flow? Sample flow is measured by attaching a calibrated flow meter to the sample inlet
port when the instrument is operating. The sample flow should be 650 cm³/min
10%. Section 11.3.6 includes detailed instructions on performing a check of the
sample gas flow.